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JUN 19 ":-;l 15:42 P Lc I P IF ELDER mak'TN 033 P03 '"w10 File No. 20-2982-02 May 21, 1991 Hogue Construction Company, znc. 9390 East Handel Road Lodi, CA 95240-9430 Attention: Mr. James F. Hogue Subject: ADDENDUM TO SEPTIC SYSTEM SUITABILITY STUDY HOGUE PROPERTY PARCEL SPLIT REPORT DATED JULY 20, 1990 SAN JOAQUIN COUNTY, CALIFORNIA NB-90-106 Gentlemen: This letter is intended as an addendum to our septic system suitability study report dated July 20, 1990, which was, prepared for the proposed Hogue property parcel split. Originally, the proximate 156-acre property located at the northeast corner of Harney sane and Tully Road was to be split into three parcels of approximately 76, 40 and 40 acres. We understand that it is now planned to split the proposed 40-acre parcel located at the southeast corner of the site .into two additional parcels of approximately 30 and 10 acres. We understand that San Joaquin County Environmental Health. has requested that ars additional percolation test be performed on the proposed 1G-acre parcel located as shown on Plate I of this report . On May 15, 1991, a representative of our firm dri11<<d and set up one 3-foot deep percolation test on the proposed 10-acre parcel. The test hole was drilled with hand drilling equipment using a 6- inch diameter continuous flight auger. Perforated PVC pipe was inserted into the test hole to prevent disturbance when adding water. The test hole was filled to the surface with water and left to soak overnight. On May 16, 1990, our representative returned to the site and performed the 3-foot deep percolation test. As per San Joaquin County guidelines, the test was perforated for a period of four hours. The last thirty minutes of the test were used to calculate the percolation rate. In order to use standard leach lines, the County requires a percolation rate of 60 minutes per inch or faster at the 3--foot depth. The 3-foot deep test performed produced a passing test of 60 minutes per inch. The County approved percolation test sheet is included with this letter. Copyright 1991 Kleinfelder, In,:.